Sex differences on g, reasoning and visualisation tested by the progressive matrices among 7–10 year olds: some normative data for Mexico

Normative data for sex differences on the Standard Progressive Matrices are presented for a sample of nine-hundred and twenty 7–10 year olds in Mexico. Factor analysis of the test showed the presence of factors identifiable as g, reasoning ability and visualisation. There was no statistically significant difference between boys and girls on the test, on g, or on reasoning. There was, however, a significant advantage for boys on the visualisation factor. There was also a non-significant trend for the boysʹ advantage on the test to decline over the 4 years and to turn into an advantage for girls at age 10. This is consistent with the faster maturation of girls from the age of about 10 through 15 years.